EP0863504A3 - Magneto-optical memory medium and reproducing method thereof - Google Patents
Magneto-optical memory medium and reproducing method thereof Download PDFInfo
- Publication number
- EP0863504A3 EP0863504A3 EP98104044A EP98104044A EP0863504A3 EP 0863504 A3 EP0863504 A3 EP 0863504A3 EP 98104044 A EP98104044 A EP 98104044A EP 98104044 A EP98104044 A EP 98104044A EP 0863504 A3 EP0863504 A3 EP 0863504A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- reproducing
- recording
- predetermined temperature
- recording layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10515—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
- G11B11/10589—Details
- G11B11/10593—Details for improving read-out properties, e.g. polarisation of light
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2525—Magneto-optical [MO] discs
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04003323A EP1422708A1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
EP04003324A EP1420400B1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
Applications Claiming Priority (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09051372 | 1997-03-06 | ||
JP51372/97 | 1997-03-06 | ||
JP5137297 | 1997-03-06 | ||
JP6368097 | 1997-03-18 | ||
JP63680/97 | 1997-03-18 | ||
JP6368097 | 1997-03-18 | ||
JP69446/97 | 1997-03-24 | ||
JP6944697 | 1997-03-24 | ||
JP6944697 | 1997-03-24 | ||
JP23222797 | 1997-08-28 | ||
JP232227/97 | 1997-08-28 | ||
JP23222797 | 1997-08-28 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04003323A Division EP1422708A1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
EP04003324A Division EP1420400B1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0863504A2 EP0863504A2 (en) | 1998-09-09 |
EP0863504A3 true EP0863504A3 (en) | 2000-08-30 |
EP0863504B1 EP0863504B1 (en) | 2008-07-30 |
Family
ID=27462635
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04003324A Expired - Lifetime EP1420400B1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
EP98104044A Expired - Lifetime EP0863504B1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
EP04003323A Withdrawn EP1422708A1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04003324A Expired - Lifetime EP1420400B1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04003323A Withdrawn EP1422708A1 (en) | 1997-03-06 | 1998-03-06 | Magneto-optical memory medium and reproducing method thereof |
Country Status (5)
Country | Link |
---|---|
US (2) | US6147939A (en) |
EP (3) | EP1420400B1 (en) |
KR (1) | KR100334413B1 (en) |
CN (2) | CN1187746C (en) |
DE (2) | DE69836571T2 (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000013177A1 (en) * | 1998-08-31 | 2000-03-09 | Sanyo Electric Co., Ltd. | Magneto-optic recording medium |
JP3568787B2 (en) * | 1998-09-08 | 2004-09-22 | シャープ株式会社 | Magneto-optical recording medium and reproducing apparatus |
KR100340656B1 (en) * | 1998-09-10 | 2002-06-20 | 마찌다 가쯔히꼬 | Magneto-optical recording medium and process for producing the same |
JP3519293B2 (en) * | 1998-11-20 | 2004-04-12 | シャープ株式会社 | Magneto-optical recording medium, reproducing method of magneto-optical recording medium, magneto-optical recording and reproducing apparatus |
JP3519295B2 (en) | 1998-11-30 | 2004-04-12 | シャープ株式会社 | Magneto-optical recording medium |
JP2000311352A (en) * | 1999-04-26 | 2000-11-07 | Sharp Corp | Optical disk and optical recording and reproducing device |
JP3626050B2 (en) * | 1999-11-02 | 2005-03-02 | シャープ株式会社 | Magneto-optical recording medium and recording method thereof |
JP2001307393A (en) * | 2000-04-25 | 2001-11-02 | Canon Inc | Magneto-optical reproducing device |
JP2002025138A (en) * | 2000-07-13 | 2002-01-25 | National Institute Of Advanced Industrial & Technology | Optical recording medium and optical recording and reproducing equipment |
US6826131B2 (en) | 2000-10-11 | 2004-11-30 | Matsushita Electric Industrial Co., Ltd. | Magneto-optical recording medium having multiple magnetic layers |
US6579635B2 (en) | 2000-10-12 | 2003-06-17 | International Business Machines Corporation | Smoothing and stabilization of domain walls in perpendicularly polarized magnetic films |
JP2002319196A (en) | 2001-04-19 | 2002-10-31 | Matsushita Electric Ind Co Ltd | Optical disk and method for processing magnetic shielding between tracks in the disk |
JP2002319195A (en) | 2001-04-19 | 2002-10-31 | Matsushita Electric Ind Co Ltd | Optical disk and method for processing magnetic shielding between tracks in the disk |
JP2002329352A (en) * | 2001-04-27 | 2002-11-15 | Sharp Corp | Magneto-optical recording medium |
JPWO2003071532A1 (en) * | 2002-02-25 | 2005-06-16 | 富士通株式会社 | Magneto-optical recording medium and recording / reproducing apparatus thereof |
JP2003338053A (en) * | 2002-05-20 | 2003-11-28 | Canon Inc | Optical recording medium |
EP1543504A2 (en) * | 2002-09-18 | 2005-06-22 | Koninklijke Philips Electronics N.V. | A magneto-optical storage medium |
JP2005050400A (en) * | 2003-07-30 | 2005-02-24 | Canon Inc | Magneto-optical recording medium |
US20070054152A1 (en) * | 2003-11-24 | 2007-03-08 | Electronics And Telecommunications Research Institute | Recording layer of magneto-optical storage medium having sublayer and method of fabricating the same |
KR100868761B1 (en) * | 2006-11-20 | 2008-11-13 | 삼성전자주식회사 | Data storage device using magnetic domain wall motion |
CN105840042B (en) * | 2016-03-30 | 2017-06-30 | 乐视汽车(北京)有限公司 | garage door control method and device |
CN107523796B (en) * | 2017-07-21 | 2019-07-05 | 华侨大学 | A kind of preparation method of the rare earth-transition alloy composite materials with wall |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2110459A (en) * | 1982-11-08 | 1983-06-15 | Kokusai Denshin Denwa Co Ltd | Magneto-optical recording system |
EP0498461A2 (en) * | 1991-02-08 | 1992-08-12 | Sony Corporation | System and method of reproducing signals recorded on a magneto-optic recording medium |
EP0586175A1 (en) * | 1992-08-28 | 1994-03-09 | Canon Kabushiki Kaisha | A magnetooptical recording medium and information recording and reproducing methods using the recording medium |
EP0619577A1 (en) * | 1993-04-08 | 1994-10-12 | Canon Kabushiki Kaisha | Magneto-optical recording medium and method for reproducing information therein |
JPH06325418A (en) * | 1993-05-12 | 1994-11-25 | Hitachi Maxell Ltd | Magneto-optical recording medium |
DE19506374A1 (en) * | 1994-03-01 | 1995-09-07 | Sharp Kk | Magneto-optical recording medium |
EP0673026A2 (en) * | 1994-03-16 | 1995-09-20 | Canon Kabushiki Kaisha | Information recording method, and magneto-optical recording medium used in the method |
DE19520627A1 (en) * | 1994-07-20 | 1996-01-25 | Sharp Kk | Magneto=optical recording medium |
JPH08106662A (en) * | 1994-10-05 | 1996-04-23 | Teijin Ltd | Magneto-optical recording medium |
DE19536796A1 (en) * | 1994-10-19 | 1996-04-25 | Sharp Kk | Magneto=optical data recording medium e.g. for optical disc |
JPH08273223A (en) * | 1995-03-27 | 1996-10-18 | Sharp Corp | Magneto-optical recording medium and its recording and reproducing method |
JPH0954993A (en) * | 1995-08-15 | 1997-02-25 | Canon Inc | Magneto-optical recording medium and reproducing method of information in the medium |
EP0810594A2 (en) * | 1996-05-27 | 1997-12-03 | Sharp Kabushiki Kaisha | Magneto-optical recording medium |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2805746B2 (en) * | 1987-11-30 | 1998-09-30 | ソニー株式会社 | Signal reproducing method for magneto-optical recording medium |
JP3375694B2 (en) * | 1993-07-19 | 2003-02-10 | パイオニア株式会社 | Magneto-optical disk and magneto-optical disk reproducing device |
JP3088619B2 (en) * | 1994-01-17 | 2000-09-18 | 富士通株式会社 | Magneto-optical recording medium and method of reproducing information recorded on the medium |
JP3230388B2 (en) * | 1994-03-15 | 2001-11-19 | 富士通株式会社 | Magneto-optical recording medium and method of reproducing information recorded on the medium |
JP3380621B2 (en) * | 1994-06-24 | 2003-02-24 | 日立マクセル株式会社 | Magneto-optical recording medium reproducing method, magneto-optical recording medium and magneto-optical recording and reproducing apparatus using the same |
JPH08124229A (en) | 1994-10-19 | 1996-05-17 | Sharp Corp | Magnetooptic recording medium |
JP3172051B2 (en) | 1994-12-27 | 2001-06-04 | シャープ株式会社 | Magneto-optical recording medium |
JP3445023B2 (en) * | 1995-06-08 | 2003-09-08 | シャープ株式会社 | Magneto-optical recording medium, its reproducing method and recording method |
-
1998
- 1998-03-02 US US09/032,985 patent/US6147939A/en not_active Expired - Lifetime
- 1998-03-05 KR KR1019980007252A patent/KR100334413B1/en not_active IP Right Cessation
- 1998-03-06 EP EP04003324A patent/EP1420400B1/en not_active Expired - Lifetime
- 1998-03-06 EP EP98104044A patent/EP0863504B1/en not_active Expired - Lifetime
- 1998-03-06 DE DE69836571T patent/DE69836571T2/en not_active Expired - Lifetime
- 1998-03-06 DE DE69839787T patent/DE69839787D1/en not_active Expired - Lifetime
- 1998-03-06 EP EP04003323A patent/EP1422708A1/en not_active Withdrawn
- 1998-03-06 CN CNB981094953A patent/CN1187746C/en not_active Expired - Fee Related
- 1998-03-06 CN CNB2004100751261A patent/CN100338672C/en not_active Expired - Fee Related
-
2000
- 2000-01-07 US US09/479,256 patent/US6272077B1/en not_active Expired - Lifetime
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2110459A (en) * | 1982-11-08 | 1983-06-15 | Kokusai Denshin Denwa Co Ltd | Magneto-optical recording system |
EP0498461A2 (en) * | 1991-02-08 | 1992-08-12 | Sony Corporation | System and method of reproducing signals recorded on a magneto-optic recording medium |
EP0586175A1 (en) * | 1992-08-28 | 1994-03-09 | Canon Kabushiki Kaisha | A magnetooptical recording medium and information recording and reproducing methods using the recording medium |
EP0619577A1 (en) * | 1993-04-08 | 1994-10-12 | Canon Kabushiki Kaisha | Magneto-optical recording medium and method for reproducing information therein |
JPH06325418A (en) * | 1993-05-12 | 1994-11-25 | Hitachi Maxell Ltd | Magneto-optical recording medium |
DE19506374A1 (en) * | 1994-03-01 | 1995-09-07 | Sharp Kk | Magneto-optical recording medium |
EP0673026A2 (en) * | 1994-03-16 | 1995-09-20 | Canon Kabushiki Kaisha | Information recording method, and magneto-optical recording medium used in the method |
DE19520627A1 (en) * | 1994-07-20 | 1996-01-25 | Sharp Kk | Magneto=optical recording medium |
JPH08106662A (en) * | 1994-10-05 | 1996-04-23 | Teijin Ltd | Magneto-optical recording medium |
DE19536796A1 (en) * | 1994-10-19 | 1996-04-25 | Sharp Kk | Magneto=optical data recording medium e.g. for optical disc |
JPH08273223A (en) * | 1995-03-27 | 1996-10-18 | Sharp Corp | Magneto-optical recording medium and its recording and reproducing method |
US5684764A (en) * | 1995-03-27 | 1997-11-04 | Sharp Kabushiki Kaisha | Magneto-optical recording medium having a plurality of magnetic layers |
JPH0954993A (en) * | 1995-08-15 | 1997-02-25 | Canon Inc | Magneto-optical recording medium and reproducing method of information in the medium |
EP0785545A2 (en) * | 1995-08-15 | 1997-07-23 | Canon Kabushiki Kaisha | Magneto-optical recording medium and method of reproducing from such medium |
EP0810594A2 (en) * | 1996-05-27 | 1997-12-03 | Sharp Kabushiki Kaisha | Magneto-optical recording medium |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 08 30 August 1996 (1996-08-30) * |
Also Published As
Publication number | Publication date |
---|---|
CN1201227A (en) | 1998-12-09 |
US6272077B1 (en) | 2001-08-07 |
EP1420400A1 (en) | 2004-05-19 |
EP1422708A1 (en) | 2004-05-26 |
EP1420400B1 (en) | 2006-11-29 |
CN1577557A (en) | 2005-02-09 |
EP0863504B1 (en) | 2008-07-30 |
DE69836571D1 (en) | 2007-01-11 |
CN100338672C (en) | 2007-09-19 |
KR19980079926A (en) | 1998-11-25 |
DE69836571T2 (en) | 2007-10-04 |
KR100334413B1 (en) | 2002-06-20 |
EP0863504A2 (en) | 1998-09-09 |
CN1187746C (en) | 2005-02-02 |
US6147939A (en) | 2000-11-14 |
DE69839787D1 (en) | 2008-09-11 |
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